Checkbox Looping In Php While Posting To Database

I am building at the moment an achievement system that works on the foundation of checkboxes (since its not post related) However, I bumped into a problem, and I cant seem to wrap

Solution 1:

why don't you just give the checkbox the value of the achievement and get rid of the hidden input

<input type='checkbox' id='achievement' name='IsChecked[]' value = '<?php echo $row['AchievementId'];?>'>

then in the php

 foreach ($IsChecked as $AchievementId){